England and France's main bowler? (6)
I believe the answer is:
seamer
'bowler?' is the definition.
(short for a seam bowler in cricket)
I don't understand the rest of the clue.
(Other definitions for seamer that I've seen before include "The joiner" , "cricket fixture?" , "Swing bowler" , "Type of quick bowler" , "sewer" .)